Fractional-dimensional approach for excitons in GaAs films on Al<sub><italic>x</italic></sub>Ga<sub>1−<italic>x</italic></sub>As substrates

Fractional-dimensional approach for excitons in GaAs films on Al_xGa_1−xAs substrates

Wu Zhen-Hua¹, Chen Lei², Tian Qiang^{3, †,}

The corresponding fractional dimension D as a function of the film thickness for different Al concentrations at the substrate thickness L_s = 20 Å.